Improvement in exhaust-nozzles



@stern-t its.

if; matted i gister A FABER nu raus,

or New YORK, N. Y.

Leners Patent N 107,603, (zaad samba 20, 1870.

The Schedule referred to in these Letters Patent and making part of thesame.

invention.

`Figure' 2 isa transverse section of the same, taken in the planeindicated by the line x x, tig. 1.

Figui-e3 is asimilar section, the line y y, iig. v1,inr dicatingtheplane of section.

ASimilar letters indicate corresponding parts.

This invention relates to a nozzle of that class which. is used for thepurpose of producing arvacuum in a furnace, cupola,`converter, or otherapparatus of a similar nature, or in the ascension-pipe ot' a pump, orin any apparatus wherethe air is to be exhausted' or rarefied.

The improvement consists in making the nozzle with agradually-increasing cross-section from its narrowest point toward thedischarging end, the orifice of the nozzle presenting two or more datbranches, in such a manner that the jet of steam, while passing throughthe nozzle, is allowed to expand, and brought in that form whichpresents the greatest possible surface of contact with the airascompared with the volume of steam which discharges from the nozzle, and,thereby, the useful eect of the nozzle is materially increased.

In the drawing- The-letter A represents a nozzle, which is provided atits receiving end with a screw-thread, a, so that it can be convenientlysecured to a pipe connecting 'with a suitable steam-generator.

' Said receiving end is bell-mouthed and. circular, but

the .area of vthe transverse 4section of the nozzle changes graduallyinto a cross, and itincreases toward the discharging end, as shown inthe drawing, so that the transverse section of the nozzle, near itsdischarging' end, is such, as shown in fig. 2.

By thesemeans the jet ot' steam discharging from the nozzle presents avery large surface of contact with the surrounding air, as compared withthe volumeof said jet, and the 'effect of the nozzle 4is greatlyimproved.

f It must be remarked that this object can, also, be obtained, but lessperfect, by giving to the discharge opening the shape of a simple datchannel, or, iii other words, by making the same only with two branches,b bf, instead of with four, as shown in the drawing, or

the number of these branches may be three or live,- -or any desirednumber, although my experiments show that a nozzlewith four branchesgives the best effect.

It' desired this nozzle ,may be used with a core in thc usual manner forregulating the area of the receiving opening, this opening being'leftround for this pur-l pose;

What I claim as new, and desire to secure by Letters Patent, sv 1. Asteam-nozzle, the discharging end -of which presen ts two or more flatbranches, yb b', substantially as shown and described.

2. A steam-nozzle, having aclrcularreceiving end,

and a discharging end, with'two or more at branches, v

b b', and the area of whichA gradually increases from its narrowest parttoward the discharging end, substautially as set forth.

- A. FABER DU FAUR. Witnesses:

W. HAUEF, E. F. KASTENHUBER.

